Why mmWave Radar Can Detect a Still Human Body
The phrase “mmWave radar can detect still people” is easy to misunderstand. It can sound as if a radar naturally knows there is a person sitting still in the room.
That is not the right model.
Radar receives electromagnetic echoes. It observes distance, angle, reflection strength, velocity, phase, and how those values change across frames. Whether those changes mean “a human is present” is an algorithmic interpretation.
The first model is: mmWave presence radar does not detect the concept of a human directly. It observes echo energy, velocity, phase, range bins, angle bins, and multi-frame changes, then classifies some patterns as human presence.
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